Power-transmission mechanism.



H. H. HARDINGE.

POWER TRANSMISSION MEGHANISM.

. Arrmoumn rum) nm. a1. 190e. 985 ,342. Patented Feb. 28, 1911.

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7 /fl V 985,342. Emmen-11911283911.

H. H. HARDINGE. `POWER TRANSMISSION MEGHANISM. APPLICATION FILED DEU- 31, 1909.V

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H. HHARDINGE.

POWER TRANSMISSION MEGHNISM.

APPLICATION Hum 13116.31, 190e.

Patented Feb. 28, 1911.

5 SHEETS-SHEET s.

H. E. HARDINGE.. PDWBR TRANSMISSON MECHANISM. APPLIUATION FILED mm. a1, 190s.`

985,342. Patented Feb. 2s, 1911.

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HENRY H. IIABDINGII, OF CHICAGO; ILLINOIS, ,AssIoNOnp 00,913 cHIcaeO,`-ILLINOIs, A CORPORATION OF ILLINOIS.

rowEnrTRANsi/IISSION. MECHANISM. i f' ing is a specification.

.f 4This invention relates to improvements in power transmitting mechanisms vwherein it is desirable to transmit power from a con tinuously rotating drive shaft to an intermittent-ly rotated driven shaft, and wherein l it is necessary that the length of dwell between `the successive rotations of the driven shaft be capable of variation to suit the exigencies of the particular machine with Whlch the invention is to be employed.

invention is particularly adaptable for` use in connection with certain typescasting machines, as for example, a machine of the general character set forth in U. S. Patent 926,740 granted to me on July 6, 1909. In

V this as well as in all other type-casting machines, the molten metal must be retained in the mold a suiiicient lengt-h of time to allow it to harden before it canbe removed, and this hardening period is of course dependent upon the size of the type being cast.l By employing my power transmitting device, to be hereinafter fully described, in connection with such a machine the operation of the type-casting machine can be delayed for a variable predetermined period to allow the metal in the mold to harden sufficiently to be handled.

While I have/mentionedmy invention as being particularly adapted for use in connection with type-casting machines, it will be 4,obvious that it may be employed wherever desirabler to impart an intermittent rotaryv mot-ion to' adriven shaftfrom a constantly rotating driving shaft.

My invention will be best understood by referring to the following description when taken in connection with the accompanying illustration of [one specific embodiment thereof, while its scope will be more particularly pointed out in thev appended claims- In the accompany-ing drawmgs, Figure 1 is a plan view of my invention.. Fig. 2 is" anend elevation thereof looking toward the,

left in Fig-1. Fig. 3 is an elevation looking at the other end of the device.` Fig. 4 1s an enlarged view of 'one end of thedrive shaft .showing the spring for normally holding the Speecation of Letters Patent. vApplication led December 31,1909. Serial No. 535,745.

vwhich controls the clutch actuating be replaced by clutch in inoperative position. Fig. 5 is a sectional View on the lines 5 5 of Fig. 4.

Fig. 6 is an elevation of the` mechanism piston, the piston chamber and valve chamber bcing shown-in section on the line 6-6 of Fig. 1. Fig. 7 is a section on line'7-7 of Fig. 6. Fig. 8 is an enlarged plan of the friction disk and roller, the bearlng and gear wheel being shown in section. Fig. 9 is a sectional elevation taken on line 9 9 of Fig. 4. Fig. 10 is a section taken on line 10-10 of Fig. 6. giig. 11 is a section taken on line 11-11 of g.` 6. p

In the drawingsthe vertical side pieces 5 which form the supporting standards for the machine in lconnection with which my invention is to be employed, are provided at any desired or convenient height, with,

shelves 'upon which is secured the bed or supporting frame 7, b boltsor other securing means.v The .bed carries a motor base 8, upon which is mounted a motor 9 in the usual manner. tric motor in connection with my invention, it is to be understood that this motor may any other desired or preferable vform of power generator. Upon Vthe motor shaft 12 is splined a spuregear 13, which is held in place longitudinally there Patented Feb. 2s, 1911.

While I have-shown an elec-y on lby the, parallel members 14 which carry the pinions 15 and 1G rotatably mounted therebetween so that power 'may be trans- `mitted to 16 from the spur-gear 13 through The upper ends of the mem` the pinion 15.4 bers 14 are pivotally connected at 18 to a forked-shaped member 19 provided at its free extremity with a downwardly project ing engaging pin 21. `This pin is" adapted to be positioned in any one of a series of holes 22 in a plate 23 secured upon a bar 24 which is attached byscrews to the side piece 5'. By positioning the pin 21.in any desired hole along the plate the `pinion 13 and the members 14v carrying the pinions 15 and 16, may be adjusted to any desired position longitudinally of the motor shaft. Upon the bed 7 are also mounted supports or standards 25 and 26 providing bearings for the drive shaft 3, which is supported therein so as to be capable of slight longitudinal movement relatively to the bearings. The drive shaft has secured thereto a gears 27 plurality of D of varying s izes adapted to be loo obvious that the rotation of the drive shaft' may be regulated to any desired rate by setting the pin 21 in the properhole to bring the pinion 16 into mesh with the proper sized gear 27. The holes 22 in the plate 23 .are situated at varied distances from the 'motor shaft, in order that the pinion 16 may be held at the proper height to mesh with the particular gear 27 over which it has been adjusted. Intermediate its ends the drive shaft 3 vhas secured thereon a pinion 28 adapted to meshwith the gear 29 fastened upon one end of an intermediate shaft 31, mounted in a suitable bearing 32 onv the bed, and said shaft has fixed thereto, at its other end, a pinion 33 adapted to engage and drive a gear A34 secured upon the reducedA end 35 of a shaft 36 mounted in a suitable bearing 37. Said shaft 36 is provided at its other end with a friction disk 38 secured thereto and against the face of which a roller 39 is` adapted to press and be rotated there- The shaft 36 can be longitudinally adjusted by means of a thumb-screw 41 engaged in a standard 43, as clearly shown in Fig. 8, to bring the friction disk in proper relation to the friction roller.

The roller 39 is secured by means of a set screw 44 or other preferred fastening means, upon a spindle 45 supported near one end in a suitable bearing on a standard 46 mounted upon the bed 7. The other eudof said spindle is splined or otherwise secured within a sleeve 126 so as to impart to said sleeve a rotary motion, but to be capable of longitudinal movement relatively thereto, said sleeve being rotatably mounted in a bearing 127 lVhen the friction disk has been properly adjusted by means ot4 the thumb-screw'41, its face frictionally engages the roller 39, and when motion is imparted to the drive shaft 3, the roller 39 and the' spindie 45 are given va constant rotation from the drive shaft through the intermediate` pinions and gears 28, 29, 33 and 34 respectively.

" Thedrive shaft 3 is adapted through intermediate connections hereinafter described, to drive the shaft 11, which will be sleeve 57 surrounding and rotatable independently of the drive shaft 3. The forked standard 26 provides a plurality of bearings for the sleeve and drive shaft. This sleeveV and drive shaft are adapted to be connected by means of a friction clutch, one member '53 of whichv is secured upon the sleeve 57 and the other member 55 of which is rigidly fastened upon the drive shaft. yBy impartingto the `drive shaft a longitudinal move- 'be evident that when the nient the member 55 may beadjusted into and out of engagement with the member 53, thereby connecting and disconnecting the driven and drive shafts.

movement of the drive shaft is limited by the collars 56 secured to the shafton either side of the bearing in the standard 25 spaced a suflicient distance from the bearing to permit the shaft a limited longitudinal movement.

4, it will be seen that the standard 26 is of Referring non more specifically to Fig.

The longitudinal vel-:c shape, the lefthand portion 54 providing a bearing for the driveshafft 3, while the right hand vportion 53 surrounds and acts as a bearing for the aforementioned sleeve 57. The pinion 52 secured to said sleeve is heldin place between the two arms of the standard 26 as shown. Upon the outside end of the shaft- 3 issecured a cap 59 which prevents a collar 61 loosely mounted on said shaft from slipping off its end andy serves as a bearing face against which the collar may thrust when itis drawn outwardly, as will be hereinafter described, tov impart to the drive shaftr a longitudinal movement yfor the *purpose of bringingf the clutch member into engagement with the member 53, and thereby imparting through .the sleeve 54 and-pinion 52, a rotary movement to the gear 51. A ring 62 is also rigidly secured upon the drive shaft just inside the collar 61 to provide a thrust shoulder for the purpose of thrusting said-shaft inwardly to release the clutch when the collar 61 is.forced against it. This inward movement of the shaft to release the clutch,

is accomplished by a coiled tension spring 63 secured at one end to a stud 64 projecting means of a thumb-nut 67 upon a rod 68 eX-` tending through said lugand to one end of which the coil spring 63 is attached by inserting one end thereof through an openingl in the rod or b-y any other preferred form of fastening. i j

The yoke 65 as clearly shown in Fig. 2, is extended laterally at its lower end to rest in bearingsY 69 secured to the bed, and is `adapted .to be rocked in these bearings iiiwardly and outwardly in a 4manner hereinafter to be described. The yoke at its uppery end is tapped on either side for the recept-ion of screws 71 and 72, which extend through the sides of the yokeand into.the collar 61, as clearly shown in Fig. 9. It will oke is rocked inwardly or to the right,- loo ring at Fig. 4, by

`the spring 63, it will thrust the` collar 61 against the ring 62 secured upon the drive shaft, and impart to` said shaft a` longitudinal movement inwardly to release the clutch members, and vthereby disconnect the line of clutch rmembers disengaged, the contrac-` tional force of the spring 63 will. cause the `inner edge of the gear 52 to frictionally engage with the shoulder 60 of the bearing 58,

l and thereby act as a` brake to stop the rotation of the sleeve 57 and consequentlythe operation of the machine which is actuated' frbm the driven shaft-11.` i I ha-ve found in sbmeinstances that it 1s deslrable to lnterquise `a friction diskbetween the shoulder 60 and the edge of the gear 52 to increase their frictio-nal engagement and' thereby accelerate thel stoppage of the machine. For the purpose of releasing said gear andshoulder from frictional engagement without throwing-the main clutch into action so that the Y machine may be turned over by hand when desired, I have provided a means for movi ing the drive shaft outwardly a short distance and hold" '1g it in that position, which is best illustrated in Figs. 4 and 5. i

Tapped into the outer arm of thstandard 26, is a lug 7 2, and screwed into the lug is an outwardly projectiugstem 73 which extends through a bearing portion 74 in the yoke and is adapted to be engaged by a cam member 75 pivotally mounted on a .bearing 76, between ears 77, integral with the said bearing portion. The bearing portion is secured to said yoke by means of a nut 78 as shown in Fig. 5.: An operating handle 79 on the cam provides a means by .which the cam may be rotated on its bearing, to engage the rigid stem 73 and force the yoke 65and the drive shaft 3 outwardly.

The frictional engagement between the caml and the stem will hold the edge of the gear 52 away from the shoulder 60 so that the y machine is -free to beturned over byhand.

tof

. The'mechanism for intermittently bringing the clutch ymembers into. engagement when an intermittent rotationsof the'driven,

shaft is desired, as for instance when my invention is to beV used in connection with type-casting machinesl as before mentioned, will nowpbe" described.

To the outer end of the pin 72 'in thefhead of the yoke 65, is attached a link 81 secured by a pin 82between the projecting ears of a stud 83, tapped into the head of a piston or plunger 84, which is adapted to be reciprocated in the cylinder 85. Then the piston is forced outwardly or to the left, viewing Figs. 6 and 7, it will 'be apparent that through rthe instrumentality of the link 81, the yoke 65 will be rocked and the drive shaft thrust outwardly I prefer toemploy for movingthe piston 84:, compressed air, but I do noty wish to limit myself to this particular method of moving the cylinder. as the same results might. be obtained if the link 81 were moved by any other means. In the embodiment disclosed, however, referring particularly to Fig. 6, I haveconneoted the interior of the cylinder with the compressed.

air su l t-hrouvh a assa e 86 openin PP y s P 8 A g into a valve chamber 87. Mounted to re- 'ci rocate in this chamber is the slide or cuto valve 88 which is reducedat 89 to provide a chamber opposite the inlet port 90 shown in dotted lines in Fig. 6, which connects with the compressed air supply. Ex-

tendingalong the valve side from the reyan exhaust pipe l94. When theuvalve is raised and. pressure admitted to the cylinder, the drive shaft-will be thrust toy the right, viewing Fig. 1, thereby closing the clutch. lVhen the valve is lowered the port 86 is iirstY closed to the compressed air, then opened to the eX- haust, whereupon the piston isforced back into thel cylinder by# the sprinjl 63 acting 'upon thel yoke 75, and t-he clutc` is opened. y For the purpose of raising thevalve to admit air under pressure, to the `cylinder at a predetermined time, I have provideda lever fulcrum'ed at 96, and pivotally connected at 97 to the link 98, which in turn is attached at 99 to the valve body.

As has been previously described, the spindle 45 is given a continual rotary movement' `from the drive shaft through the instrumentality of the intermediate gears and the friction disk acting upon the roller 39. Said spindle is splined, so that it is capable of llongitudinal movement, to a disk vwheel 101.,

'secured on one end of the sleeve 126 and which is provided with a pin 102 extending out from one of its faces and adapted upon rotation of the wheel to engage with a block 103 slidably mounted near the outer end of the lever 95. This block as clearly shown in Figs. 10 and 11, is of channel shape and sets down over the top of the lever 95. It has secured thereto by a pin 104, extending through one side of the block and into a slot v 105 in the lever 95,'a connecting link 106-in turn attached at its other end to a disk'l07 secured to a pin 100 extending through andy supported byV a bearing in the end of the lever 95. Thepin 100 extends some distance beyond the outer end of the bearing 110 and has iixedly secured upon itsend by a screw' 120, a disk 130. Interposed between said disk and the bearing 110, is a coiled` spring one end of which is secured tothe bearing, and the other\to said disk, C and cient to move the piston outwhich tends normally to retain the disk 107 and keep the block 103 Vin the normal 'position shown in Fig.6. In this position of the block on the lever 95, each revolution of;the spindle and disk 101, will causev thepi-n 102 to engage the block, thereby depressing the outer end of the lever 95 `and momen-y tarilyraising the valve body so that the port 86 may be opened to the compressed air. By sliding the Y block along toward the end of the lever 95 it can be removed from the path of the pin .102,- and since said lever itself is outside the path of said pin, no movement of the valve would be produced by the rotation of the disk 101. In order that the block may -be thus withdrawn by the operator when it f isdesired to stop the driven shaftlfor any reasonfI have connected to the disk 107 by ris held in this position, although the disk 101 continues-to revolve, the drive shaft will be retained in its innermost position by the spring 63, ,and the connection between the l drive and driven shafts will be broken at the clutch. In the normal operation of the mechanism, however, the controlling valve 88 will be positively raised at regular predetermined intervals, thereby permitting the clutch to be closed.

In order that the controlling valve may be depressed to release the pressure in the cylinder at a predetermined time, I have i provided a device under the lcontrol of the driven shaft for positively depressing said valve after said shaft has completed one revolution. As best shown in Figs. 2 and 3 this valve depressing mechanism consists of -a U-shaped lever 116 pivotally mounted at 117 upon an outwardly extending bracket -118 secured to the exhaust pipe 94 by a set screw 119, Fig. 6. The lever 116 when mounted upon this bracket is so positioned that its lower end which is provided with an enlarged bearing face 121, is directly over a lug or pin 122, integral with or se-` cured tothe upper end of the valve 8S. The upper end of the lever projects into the path of a pin 123, extending through Aand secured to the gear wheel 57 by a nut 124 as shown'inFigs. 2 and 3. When t-he valve '88 is in raised position the upwardly turned end 125 of the lever 116, is elevated thereby into a position to be engaged by the pin 124 as ,the wheel revolves in the direction shown by the arrow in Fig. 3'. The engagement ofv 'the pin withl the lever depresses the lower for the spindle.

end vof the lever which 'acts upon the stud 122 and positively forces .the valve 88 downwardly, thereby opening the same. It will thus be seen that the vvalve is positively deh pressed to permit the clutch to be opened short/Ien this interval between the successive raising of the valve and consequent closing of the clutch, to suit the exigencies of the particular machine to 'which my invention is to be applied, and in order to provide for such variationI have mounted the spindle 45 so that it is capable of longitudinal adjustment to bring the friction roller 39 nearer to or farther from the center of the friction disk 38, thereby varying the speed at which the spindle is rotated. To accomplish this end 'the spindleis loosely mounted in the bearing 46, and has secured to its outer yend by means of a screw 128, a down- Wardly extending arm 129 integral with an adjusting rod 131 .which projects inwardly through a bearing 132 below the bearing 46 into the bearing 132 and when the rod has been longitudinally adjusted until the roller 39 occupies the proper position against the face of the friction disk 38 to give the desired speed to the spindle 46, the said spindle may be locked from longitudinal movement by tightening the set screw 133 until it holds the rod 131 against movement, whereby the speed necessary to give the desired dwell between the opening and the closing of the clutch, is imparted to the spindle.'

A continuous rotation may be given to the A set screw 133 projects driven shaft when desired by simply With- 1 drawing the pin 123 from the gear 51 so that the valve restoring lever 116 will not be operated to depress the controlling valve. In

that event t-he clutch would be held in closed position by the air pressure in the cylinder acting .continuously against the piston.

While I have illustrated and described a preferred embodiment of the invention, Ia am aware that it may be carried out in many other forms than that shown, without departing from the scope thereof, as expressed in thegclaims. Therefore, I no not wish .to

be limited to details shown, but

WhatI do claim'is:

1-. A power transmitting mechanism comprising in combination, Aa drive shaft, a driven shaft, means under control of the drive shaft for connecting said shafts, and means controlled by said driven shaft for disconnecting said. shafts.

2. A vpower transmitting mechanism comprising, a drive shaft, a driven shaft, mechanism including a clutch connecting said shafts, means controlled by the drive shaft for actuating said clutch in one direction, and means controlled by the driven shaft for actuating said clutch in the other direction. 3. In a power transmitting mechanism, a

drive shaft, a driven shaft, mechanism in-y cluding a clutch connectingsaid shafts, au-

tomatic means for closing said clutch, automatic means for opening said clutch and manually controlled means for moving one member of the clutch against the `force of the clutch opening means to permit free rotation .of the driven shaft. l

4. power transmitting' mechanism comprising, a -drive shaft, a driven""shaft, mecha `nism comprising a' clutch for connecting said shafts, means tending to ,normally` retain the clutch in open position and pneu- 4` matic means for automatically closing said clutch at predetermined intervals..

5. Apower transmitting mechanism, comf i prising a drive shaft, a driven shaft, operative connections includinga clutch for conynecting said shafts, means for constantly urging said. clutch toward open position, and automatically controlledV pneumatic` means for closing said clutch at predetermined 'intervals against the force of said opening means. A r

A6. In a power transmitting mechanism,l the combination of a drive shaft, a driven shaft,rmechanism including a clutch for con-I nectin said shafts, a pneumatic device for actuating said clutch, continuously rotating mechanism for causing the operation of the pneumatic device at predetermined intervals, and adjustable means for varying the length ofsaid intervals.

7. In a power transmitting mechanism,

l the combination of a driveshaft, a driven shaft, operative connections including a clutch between said shafts, a pneumatically operated device for actuating said clutch, an intermittently actuated mechanism for controlling the opera-tion of said device, and

` means comprising a friction disk and an adjustable roller for determining the frequency of actuation of the said mechanism. i

8. In a power transmitting mechanism,`

the`co1fnbinationrof4 a drive shaft, a driven shaft, connecting means including a `clutch interposed between said shafts, a pneumatically operated device for actuating said clutch, means for controlling the operation of said device, a continuously nrotated member adapted to intermittently actuate said controlling means, and adjustable mechanism for regulating the speed of said .continuously rotating member, whereby the drive and driven shafts may be connected and disconnected at' regular predetermined intervals. e f

9. In a power transmitting mechanism, Va

drive shaft, a driven shaft, a connecting mechanism including clutch interposed be tween said shafts, and-means for intermittently actuating said clutch comprising 'al pneumatic device for closing said clutch, mechanism for automatically controlling said cliitcl l10. In a power transmitting mechanism, a drive shaft, a driven shaft, connecting ,instrunientalities including a clutch inter posed between said shafts, and means for intermittently actuating said clutch comprising a pneumatically operated device for closin g said clutch, mechanism for automatically controlling said closing device, and independent means for automatically opening said clutch. f

11. In a power transmitting mechanism, a drive shaft, a driven shaft, mechanism in cluding a connecting clutch interposed be-l tween said shafts', and means for intermittently actuating said clutch comprising a valve controlled, pneumatically operated device for closing said clutch, mechanism for automatically controlling said closing device and independent automatic means for opening said clutch.

12. In a power transmitting mechanism, the combination of a clutch, and means for closing said clutch comprising a pneumati cally' operated piston, a controlling valve therefor, a continuously rotating means for intermittently actuating said valve, and adjustablenechanism for regulating the speed of said rotating means whereby the interval between successive valve actuations maybe varied. Y

13. In a power transmitting mechanism, the combination ofa longitudinally movable drive shaft, a driven shaft, a clutch connec said closing device, and means for opening tion between such shafts, a yoke secured to a collar on said drive shaft, resilient j means for normally Y holding said yoke in one position and automatic meansfor intermittently thrusting said yoke in the other direction to actuate said clutch, substantially as described. n

14. In a power transmitting. mechanism, the combinationfof a longitudinally movable drive shaft, a driven shaft, means including a clutch for connecting said shafts, one` member of said clutch being secured on said drive shaft, means for normally retaining the drive shaft with the clutchin inoperative position, manual means for moving said drive shaft longitudinally a limited distance against the force of said retaining means and means for automatically, closing said clutch. l t

15. In a power transmitting mechanism, the combination of a longitudinally movable drive shaft, a driven shaft, mechanism including a clutch connecting said shafts, .a device for closing said clutch, a pneumatic 'for positively'r actuating'said "controlling ."slia'fts, 'meansr for normally retaining'v said clutch in inoperative position, a` pneumati ally operated device for closing said clutch,

a controlling valve therefor, means for intermittently closing said valve, andseparate.` means for positively opening said valve.A

Y 17." In a power transmitting mechanism, inJ combination, a clutch, a pneumati'eallyoperated device 'for actuating said clutch, a controlling'valve therefor, a lever for closing said valve, a block s'lidable on said lever, `normally positioned in the path of a continuously rotating pin, and means for withdrawing said block from the path of said nin.

l 18. In a power transmitting mechanism, the vcombination of clutch, a pneumatically operated device for actuating said clutch, a controlling valve therefor, a lever for closing said valve, a sliding block mounted on said lever, a rotatable disk connected to said block, and manualv means for rotating said disk to withdraw the'block from its operative position. v

19. In a power transmitting mechanism, the combination of a drive shaft, a driven shaft, connection including a clutch between said shafts, a pneumatically operated device for actuating said clutch, a controlling valve for said device, means for intermittently closing said valve, and means comprising a pivotally mounted lever having one end adapted to engage the top of said valve and the other end positioned'in the path of a rotating pin operated from said driven shaft, for positively opening said controlling valve.

20. In a power transmitting mechanism, vthe'combination of .a drive shaft, a drivenshaft, a clutch, a pneumatically operated device for actuating said clutch, a control# ling valve for said device, means under thev control of the driving shaft for closing said valve, and means under the control of the driven shaft for opening said valve. y

21. In a power transmitting mechanism, a longitudinally movable shaft, a yoke connected to one end of said shaft, pneumatic means for positively .swinging said yoke to move the shaft longitudinally in one direction, and resilient means for returning said' shaft to normal position. y,

22. In a power transmitting mechanism, a` longitudinallymovable drive shaft, a clutch, a yoke secured to said drive shaft, automatic means connected to said yoke for positively moving said drive shaft in one direction to close the clutch at lregular predetermined intervals, and means to open the clutch and retain said 'drive shaft in its normal position.

23. In a power transmitting mechanism,

`the combination of a longitudinallymovable Vdrive shaft, a driven shaft, means including a clutch for operatively connect-ingi sai y shafts, resilient means for normallyk holding 'said clutch in openypositioii,` automatic means for closing said clutch at predetermined intervals, and manual means for holding said drive shaft in a position interme diateth'e limits of its longitudinal movement.

24, In a power transmitting vmechanism, the combination of a longitudinally movable drive shaft, a device for yieldingly retaining said. shaft at `one limit of its longitudinal movement, automatic means for intermittently movingr said Vshaftto the-other limit of its longitudinal.movement and man-ual means for positioning and holding saiid shaft'- in an intermediate position.

25. In a power transmitting mechanism, the combination ofa drive shaft, a driven shaft, mechanism including a clutch for ,opl-I eratively connecting said shafts, means actu'- ated bythe drive shaft, for closing. said clutch, a device tending normally to open said clutch, and mechanism operated from the driven shaft to permit at regulai` interl,

vals the operation of the clutch openingdevice.

26. In a power transmitting mechanism,

the combination of a drive shaft, mechanism including a clutch for operatively connecting said shafts, mechanism actuated fromy ,a'spring for normally retaining said clutch in open position,Y a pneumatic device for closing said clutch against the force of said spring, a valve controlling the operation of Y said pneumatic device, means for actuating saidl valve comprising a pivotally mounted lever, a pin secured tofa continuously rotat ing disk and adapted to engage said lever and swing it about its pivot to vactuate lthe valve, driving connections betweenV said diskand the drive shaft, and an adjusting device whereby the speed of saiddisk may bel varied.

28. In aV power transmitting mechanism,

the combination of a drive shaft,'a driven shaft, means including a clutch for operatively connecting said shafts, a device tend- A ing normally to retain said clutch in open position,` mechanism -for closing said clutch at predetermined' intervals, said mechanism including a pneumatic device, a continuously rotating disk provided with a laterally pro- `jeeting pin, a Pivotaly mounted lever 1ocated in the path of said rotating pin and operatively connected to said pneumatlc device, a frlctlonal driving means for said disk, a train of gears interposed between said frictona driving means and the drive shaft, and' a. rdevice operatively connected t0 the driven shaft'end adapted upon each rotation of the drivenshaft to throw the clutch dosing means out of operation Where- 10 by to permit the @hitch to be opened by the clutch opening` device.

HENRY H. HARDINGE. y Witnesses:

- I. J. WILsoN,

Gr. E. HOLMES. 

